Synopsis:One Day, a medium built stammerer, Jun (Wang Bao Qiang) confesses a murder at police station, but he fails to illustrate the details, after long oral examination the police believes Jun is mentally disorder and his mentioned murder cases do not come from the fact.

Soon after, a cold-blooded murder unveils a series of mysterious murders in the district where Detective Han (Lau Ching Wan) stations in. Each of the victims is executed by different but equally brutal way. Han Knows that he is dealing with a serial killer. Instinct tells him Jun is the suspense after he goes over all recent statements.

The police are still lack of evidences to drop any change on Jun, Jun refuses to say anything about the next planned murder. Which prevents Han from saving the next victim, time is running out, Han is desperate to save the poor sufferers….